A free cross-platform library of fast C++ routines for the plotting of up to 3-ranged data. It can export to bitmap and vector EPS/SVG files. There are window interfaces (GLUT/FLTK/Qt) and console tools. MathGL can be used from C/Fortran/Python/Octav/Lua
Palomino was an unfinished action/combat flight simulator. Air-to-air combat mode was never implemented. However, it does have a land-on-carrier and shoot-SAMs missions.
Requires OpenSceneGraph. Optional: SDL, FLTK.